:root {
            --sidebar-width: 280px;
            --sidebar-collapsed-width: 70px;
            --topbar-height: 60px;
            --transition-speed: 0.3s;
        }
        
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background-color: #f8f9fa;
            overflow-x: hidden;
            min-height: 100vh;
            padding-top: var(--topbar-height);
        }
        
        /* Sidebar styling */
        #sidebar {
            width: var(--sidebar-width);
            height: calc(100vh - var(--topbar-height));
            position: fixed;
            top: var(--topbar-height);
            left: 0;
            transition: all var(--transition-speed);
            z-index: 1000;
            overflow-y: auto;
            box-shadow: 0 0 15px rgba(0, 0, 0, 0.1);
            background: linear-gradient(180deg, #2c3e50, #1a2530);
            color: #ecf0f1;
        }
        
        #sidebar.collapsed {
            width: var(--sidebar-collapsed-width);
        }
        
        #sidebar.collapsed .nav-link-text {
            display: none;
        }
        
        #sidebar.collapsed .sidebar-header h3,
        #sidebar.collapsed .nav-link i.bi-chevron-down {
            display: none;
        }
        
        #sidebar .nav-link {
            color: #bdc3c7;
            border-radius: 4px;
            padding: 0.75rem 1rem;
            margin: 0.25rem 0.75rem;
            transition: all 0.2s;
            display: flex;
            align-items: center;
        }
        
        #sidebar .nav-link:hover, 
        #sidebar .nav-link.active {
            background: rgba(255, 255, 255, 0.1);
            color: white;
        }
        
        #sidebar .nav-link i {
            font-size: 1.25rem;
            min-width: 30px;
            text-align: center;
            margin-right: 12px;
            transition: var(--transition-speed);
        }
        
        #sidebar .nav-link-text {
            transition: var(--transition-speed);
            white-space: nowrap;
        }
        
        #sidebar .sidebar-header {
            padding: 1.25rem 1.5rem;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            margin-bottom: 0.5rem;
        }
        
        /* Topbar styling */
        .topbar {
            height: var(--topbar-height);
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1100;
            box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
            background: linear-gradient(90deg, #3498db, #1a5276);
        }
        
        .topbar .toggle-btn {
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(255, 255, 255, 0.15);
            border-radius: 50%;
            color: white;
            margin-right: 15px;
            cursor: pointer;
            transition: all 0.3s;
        }
        
        .topbar .toggle-btn:hover {
            background: rgba(255, 255, 255, 0.25);
        }
        
        .user-profile {
            display: flex;
            align-items: center;
            padding: 0.5rem 1rem;
            border-radius: 30px;
            background: rgba(255, 255, 255, 0.15);
            cursor: pointer;
            transition: all 0.3s;
        }
        
        .user-profile:hover {
            background: rgba(255, 255, 255, 0.25);
        }
        
        .user-profile img {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            object-fit: cover;
            margin-right: 10px;
            border: 2px solid rgba(255, 255, 255, 0.5);
        }
        
        .user-profile .user-info {
            line-height: 1.2;
        }
        
        .user-profile .user-name {
            font-size: 0.9rem;
            font-weight: 600;
            color: white;
        }
        
        .user-profile .user-role {
            font-size: 0.75rem;
            color: rgba(255, 255, 255, 0.8);
        }
        
        /* Main content area */
        .main-content {
            margin-left: var(--sidebar-width);
            padding: 20px;
            transition: var(--transition-speed);
        }
        
        #sidebar.collapsed ~ .main-content {
            margin-left: var(--sidebar-collapsed-width);
        }
        
        /* Dark mode toggle */
        .dark-mode-toggle {
            position: relative;
            display: inline-block;
            width: 50px;
            height: 24px;
            margin-right: 15px;
        }
        
        .dark-mode-toggle input {
            opacity: 0;
            width: 0;
            height: 0;
        }
        
        .dark-mode-toggle .slider {
            position: absolute;
            cursor: pointer;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-color: #ccc;
            transition: .4s;
            border-radius: 24px;
        }
        
        .dark-mode-toggle .slider:before {
            position: absolute;
            content: "";
            height: 16px;
            width: 16px;
            left: 4px;
            bottom: 4px;
            background-color: white;
            transition: .4s;
            border-radius: 50%;
        }
        
        .dark-mode-toggle input:checked + .slider {
            background-color: #2196F3;
        }
        
        .dark-mode-toggle input:checked + .slider:before {
            transform: translateX(26px);
        }
        
        /* Table styling */
        .card {
            border-radius: 10px;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
            border: none;
            margin-bottom: 30px;
        }
        
        .card-header {
            background-color: white;
            border-bottom: 1px solid rgba(0, 0, 0, 0.08);
            padding: 1.25rem 1.5rem;
            border-radius: 10px 10px 0 0 !important;
        }
        
        .table thead th {
            font-weight: 600;
            color: #495057;
            background-color: #f8f9fa;
            border-top: 1px solid #dee2e6;
            border-bottom: 2px solid #dee2e6;
            padding: 1rem;
        }
        
        .table tbody td {
            padding: 0.9rem;
            vertical-align: middle;
        }
        
        .status-badge {
            padding: 0.35rem 0.75rem;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 500;
        }
        
        .status-active {
            background-color: rgba(40, 167, 69, 0.15);
            color: #28a745;
        }
        
        .status-inactive {
            background-color: rgba(220, 53, 69, 0.15);
            color: #dc3545;
        }
        
        .status-pending {
            background-color: rgba(255, 193, 7, 0.15);
            color: #ffc107;
        }
        
        .action-btn {
            width: 34px;
            height: 34px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            transition: all 0.2s;
        }
        
        .action-btn:hover {
            background-color: rgba(0, 0, 0, 0.05);
        }
        
        /* Dark mode styles */
        body.dark-mode {
            background-color: #121826;
            color: #e9ecef;
        }
        
        body.dark-mode .card,
        body.dark-mode .card-header {
            background-color: #1e293b;
            color: #e9ecef;
        }
        
        body.dark-mode .table thead th {
            background-color: #1e293b;
            color: #e9ecef;
            border-color: #2d3748;
        }
        
        body.dark-mode .table tbody td {
            background-color: #1e293b;
            color: #e9ecef;
            border-color: #2d3748;
        }
        
        body.dark-mode .table {
            color: #e9ecef;
        }
        
        body.dark-mode .topbar {
            background: linear-gradient(90deg, #0f172a, #1e293b);
        }
        
        body.dark-mode #sidebar {
            background: linear-gradient(180deg, #0f172a, #1e293b);
        }
        
        /* Responsive adjustments */
        @media (max-width: 991.98px) {
            #sidebar {
                transform: translateX(-100%);
            }
            
            #sidebar.show {
                transform: translateX(0);
            }
            
            #sidebar.collapsed {
                transform: translateX(-100%);
            }
            
            .main-content {
                margin-left: 0 !important;
            }
            
            .mobile-menu-btn {
                display: block !important;
            }
        }
        
        .mobile-menu-btn {
            display: none;
            margin-right: 15px;
        }
        
        /* Client avatar */
        .client-avatar {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            object-fit: cover;
            margin-right: 12px;
        }